DAVIE, Fla. -- NFL Hall of Fame quarterback Dan Marino showed up to Miami Dolphins' minicamp on Wednesday. There was no major announcement or holding court with the media. Marino simply arrived, kept close tabs on second-year quarterback Ryan Tannehill and the offense, then quietly left about two hours into practice.

Marino's mere presence was symbolic of the pressure Tannehill faces in Miami. ...

Tannehill has all the tools to succeed this year. The Dolphins have put together as nurturing an environment as possible to ensure Tannehill takes the next step in his development. ...

The Dolphins are going all-in with Tannehill, and much is expected this season. On paper, Miami looks like a team ready to make a playoff push in 2013, and much of that will come down to Tannehill’s development and improvement.